Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-04-2011, 09:32   #1
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41 Ohana
Posts: 3,718
Images: 9
Chain Stopper

Hi All:

I recently was having a nice conversation with a 70+ year old gentlemen and he was sharing with me some of his tricks. One thst really caught my attention was his chain stopper. I had spent $50 on the stopper and then had to have four bolts specially made because my deck at the location where I want to place the stopper is 10" thick and i couldn't find any 3/8" by 12" SS bolts. Well anyway it is on my list of things to do and is coming up soon.

In the mean time my friend told me what he does. First he attaches a snubber after which he takes 5/8" or 3/4" three strand and splices a big loop in it that will fit over his windlass. On the other end of the line he splices in a thimble. He then attaches a shackle to the chain and to the thimbled loop. He then places the big loop over the windlass and lets out enough chain so that the big loop would take the strain of the chain should the snubber break.

In my eyes it is working as a chain stopper fine. The load of the chain is taken up by the entire windlass rather then the shaft of the windlass -- At least on a horizontal windlass. Not so sure it works as well on a vertical windlass. Any critiques of this idea?
__________________

__________________
Fair Winds,

Charlie

Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
Charlie is offline   Reply With Quote
Old 24-04-2011, 09:43   #2
Registered User
 
S/V Alchemy's Avatar

Join Date: May 2008
Location: Toronto
Boat: Custom 41' Steel Pilothouse Cutter
Posts: 4,529
Re: Chain Stopper

I do not like the idea of the anchor's pull being taken up on any part of the windlass. The pull should be taken to a bollard or a chain hook attached to a stoutly backed cleat of sufficient size. The bridle/snubbers are there to distribute the load to two points on deck, and to lower the attachment point closer to the waterline.

In my view, the chain on the windlass should be slack. Its purpose is to retrieve or lower slack rode, not to transfer the energy of a bucking chain attached to a properly set anchor to the boat.

In an emergency, like your bow cleats being torn out or when needing a rough conditions tow, people have run lines or rodes back to the mast base, but again, that's a bit last ditch effort.
__________________

__________________
S/V Alchemy is offline   Reply With Quote
Old 24-04-2011, 09:53   #3
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,123
Re: Chain Stopper

Have to go with Alchemy. A windlass is generally not designed, built or installed to take the large loads, especially shock loads from the anchor rodes. The idea in general is good but drop that loop over something besides the windlass.

Unless you have a really, really big boat I would also go with much smaller line. 3/4" will not stretch very much so will not absorb the shock loads. Smaller line will do that better, probably handle any normal load and, if it does break or chaff through, the rode will be locked in to catch the boat until you can get up to rig a new snubber.

Another alternative, just use a short piece of 1/2" and tie it into the anchor rode with a Prussic knot.
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 24-04-2011, 10:00   #4
Registered User

Join Date: Jul 2006
Posts: 3,949
Re: Chain Stopper

A chain stopper is really to take the load off the windlass as you are retrieving chain. It is a one-way device: pulling in it lets the chain slide through, but if you let off on the tension it grabs the chain and won't let it go running out. If the desire is to hold the anchor in place on a roller than I think the trick described works fine for taking the load off the windlass. There really won't be much tension on the base of the windlass just holding the anchor in place. However, when at anchor a better thing to do is to have a long nylon snubber that you either tie to the anchor chain or attach with a chain hook so that you put a bit of spring into the system while at the same time taking the load off the windlass. The snubber line is cleated off on a deck cleat.
__________________
Kettlewell Cruising
Kettlewell is offline   Reply With Quote
Old 24-04-2011, 10:29   #5
cat herder, extreme blacksheep
 
zeehag's Avatar

Cruisers Forum Supporter

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,572
Images: 56
Send a message via Yahoo to zeehag Send a message via Skype™ to zeehag
Re: Chain Stopper

i figure 8 my chain around both my windlasses onmy 3 1/2 inch thick deck-- works well in rough conditions.... i havent rope rode--only chain---had no problems, so far...and my bronze antique windlass is sooo awesome!!!!!!
zeehag is online now   Reply With Quote
Old 24-04-2011, 10:44   #6
Registered User

Join Date: Jan 2010
Location: Portland,OR (W7TPH)
Boat: Cascade 42 Maria Victoria
Posts: 188
Re: Chain Stopper

"i couldn't find any 3/8" by 12" SS bolts. Well anyway it is on my list of things to do and is coming up soon."

What about using all thread? I used 1/2" 316l all thread for my windlass.
__________________
pdxsailordiver is offline   Reply With Quote
Old 24-04-2011, 11:00   #7
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,095
Re: Chain Stopper

Charlie,
Just curious, whats that 10" deck thickness consist of? If that is not a solid assembly, but is some softer core, I would be concerned about shear loads at deck level. As I said, just curious.
__________________

__________________
so many projects--so little time !!
Blue Stocking is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Flopper Stopper: Design Needed Sea Note Anchoring & Mooring 13 03-05-2011 05:50
Chain Sandero Anchoring & Mooring 3 03-09-2010 05:29
Does Chain Stopper Wear / Damage Chain ? nitpik Anchoring & Mooring 29 25-02-2010 11:51
For Sale: Wave-Stopper Dodger pdxsailordiver Classifieds Archive 1 26-01-2010 05:43
Antal Sheet Stopper Parts SCCatSailor Deck hardware: Rigging, Sails & Hoisting 1 03-10-2009 03:31


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:20.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.